Printing-press



(Model.)

J. M. JONES.

PRINTING PRESS.

. Patented Jan. 31,188.2.

N. PETERS. PhoYu-Lilhugmphar. Washinglon, n. c,

UNTTan STATES PATENT rates.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 252,950, dated January31, 1882. Application filed July ll, l88l. ("P.IodeI.)

To all whom it may concern:

Belt known that I, JOHN M. JONES, of Palmyra, in the county of Yayne andState of New York. have invented certain Improvements inPrinting-Presses, of which the fol lowing is a specification.

My invention relates to that cla-s of presses in which a vibratingplaten receives motion from a continuously-rotatingshaft5 and it consists in a novel construction and arrangement of parts for transmittingmotion from the shaft to the platen, whereby a proper dwell is socuredfor feeding, &c,as hereinafter more fully explained.

The invention'is designed as an improvement upon the press for whichLetters Patent were granted to me hearing date May 20, 1879, andnumbered 215,459, to which patent reference is made for description ofdetails not contained herein.

In the accompanyingdrawings, Figure 1 represents a. side elevation of myimproved press; Fig. 2, aninner face view of the parts by which theplaten is operated, the frame being represented in dotted lines; Fig. 3,a detail view, showing the operation of the cam by which the outwardmovement of theplaten is started.

The object of my invention is .to produce a proper dwell or periodofrest of the platen when in its outermost position, in order tofacilitate the feeding and removal of the paper, and also to render theaction of the press smooth and easy and free from jar.

In its general appearance the present machine is similar to thatdescribed in my former patent, andconsists of a frame, A, composed oftwo sides firmly connected and braced by .5 journaled in or pivoted tothe main frame, and

is connected by links orimpression-bars G with disks or heads H, securedupon opposite ends of a rock-shaft, I, extending across the frame A fromside to. side and mounted in suitable boxes or bearings, as before.

J represents an arm pivoted at one end to the side of the frame, andconnected at its free end with the disk or head H by a link,K. The arm Jis vibrated by a pitman, L, the lower end of which is provided with aslot, to, to receive a crai'ik-pin or stud, H, projecting from the outerface of the gear-wheel 1), and preferably furnished with a swivel block,b, as shown in Figs. 1 and 3. As also indicated in said figures, theslot a is somewhat longer than the block b, which p ays therein, inorder to permit a certain amount of lost motion of the crank-pin or studM and its block. This lost motion begins when thepin orstud reaches theposition indicated in Fig. 1, and by dotted lines in Fig. 2. The arm Jis formed with an overhanging extension or bracket, a. carrying aroller, (I, which, as the arm descends and the platen swings outward,comes in contact with and travels upon the face or edge of aca-m, 0,formed upon or secured to the inner face of the wheel D, and therebyprevents the arm and platen from falling suddenly. The form of the cam cis clearly illustrated in Fig. 2, and said cam is so arranged withrelation to the roller (1 that the latter comes in contact therewithjust after the platen begins its outward move ment, the roller beinglowered gradually by the curved or inclined face of the cam until itreaches the middle portion of said cam, which is concentric with thewheel D. As this concentric portion passes beneath the roller 01 thelatter will be supported thereby, and neither raised nor lowered, thearm J and platen E in consequence remaining at rest. While theconcentric portion of cam eis thus passing beueath the roller (1 theblock b or pin M is traversing the slot at, thus aft'ordingthe necessarylost motion to permit the arm J and the platen to thus remain at restinstead of being moved by the pitman L. As the wheel D continues itsrotation the latter end or portion of the cam c, which curves graduallyoutward from the middle portion toward the periphery of the wheel,passes beneath the roller (1 and starts IOO and rise of the arm J andplaten E are rendered very gradual and free from jar or shock, and aproper dwell or period of rest is secured between the fall and rise.

It not unfrequently happens that the platen sticks or becomes fast, byreason of the adherence of the paper or'material which it carries, tothe form, or from other cause, and with the construction above describedsuch failure to start would cause a jar or shock by reason of the pin orstud M carrying its block suddenly against the lower end of the slot a.To prevent this difliculty I provide the outer face of wheel D with acam,f, which engages over a shoulder on the pitman L, as shown in Fig.3, as the pitman rises to its uppermost position and forces the pitmanforward. The forward or downward movement of the pitman, and, inconsequence, the outward movement of the platen, being thus started, themovement will he completed by the weight of the platen, the arm J, andintermediate parts.

.WVhile I prefer to employ the rock-shaft and impression bars or linksfor transmitting motion from the arm J to the platen, it is obvious thatother intermediate mechanism or different connecting devices may beemployed, or that the aim might be connected directly to the platen. Theconstruction and arrangement shown is, however, preferred.

The inking mechanism and other parts not herein described may be of anyusual or desired construction.

The roller (1 is not absolutely essential, but renders the operation ofthe machine smoother and easier, and its use is therefore deemed advisable.

Having thus described my invention, what I claim is- 1. In aprinting-press, the combination of a bed, a vibrating platen, a pivotedarm connected with said platen, a rotating wheel provided with acrank-pin, and a pitman connected with the pivoted arm and slotted toreceive the crank-pin and to permit a limited move ment of the pinlongitudinally of said slot, substantially as and for the purpose setforth.

of which is slotted to receive and to permit a limited play of the pin.

3. In combination with the vibrating arm J, connected with the platen,the cam a, constructed as described, whereby it is caused to effect agradual fall and rise of the arm, and to hold the same at rest for aperiod between the fall and rise.

4. In a printing-press, the combination of a continuously-r0tating wheelprovided with a crank-pin, and with a cam the middle portion of which isconcentric with the wheel, while the end portions curve outwardtherefrom, a pivoted arm connected with the platen and provided with aroller to travel upon the cam, and a pitman connected with the pivotedarm and slotted to receive and to permit a limited play of thecrank-pin.

5. In a printing-press, the combination of a pivoted arm connected withthe platen, a contin uously-rotating wheel provided with acrankpin, apitman connected with the vibrating arm and slotted to receive thecrank-pin and to permit a limited play thereof, and a cam,f, formed uponor secured to the wheel and adapted to start the pitman forward,substantially as described.

6. The herein-described press,.consisting of a bed, a vibrating platen,links or bars connecting the platen with disks secured upon arock-shaft, a vibrating arm connected with one of said disks andprovided with a roller, a continuouslyrotating wheel provided with acam, e, and pin M, and a pitman connected with the vibrating arm andslotted to receive and to permit'a limited play of thepin, substantiallyas set forth.

JOHN M. JONES.

Witnesses:

LYMAN LYoN, O. DURFEE.

